SNESSetNGS

Sets the user nonlinear Gauss-Seidel routine for use with composed nonlinear solvers.

Synopsis

#include "petscsnes.h"  
PetscErrorCode SNESSetNGS(SNES snes, SNESNGSFn *f, void *ctx)

Input Parameters

• snes - the SNES context, usually of the SNESType SNESNGS

• f - function evaluation routine to apply Gauss-Seidel, see SNESNGSFn for calling sequence

• ctx - [optional] user-defined context for private data for the smoother evaluation routine (may be NULL)

Note

The SNESNGS routines are used by the composed nonlinear solver to generate a problem appropriate update to the solution, particularly SNESFAS.

See Also

SNES: Nonlinear Solvers, SNESNGS, SNESGetNGS(), SNESNCG, SNESGetFunction(), SNESComputeNGS(), SNESNGSFn

Level

intermediate

Location

src/snes/interface/snes.c

Examples

src/snes/tutorials/ex55.c
src/snes/tutorials/ex19.c
src/snes/tutorials/ex15.c
src/snes/tutorials/ex5.c
src/snes/tutorials/ex16.c

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Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages